(The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related fun ...) (CVE-2026-49289)
The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. In 4.19.2 and 4.20.2, the library permits attacker-controlled XPath transforms while processing XML signatures in specially crafted SAML messages. XPath evaluation can consume uncontrolled processing resources, allowing a remote unauthenticated attacker to deny service to any entity relying on SimpleSAMLphp or directly on the SAML2 library. The mitigation limits the number of transforms, permits only transform algorithms identified by the SAML 2.0 Core specification, and specifically rejects XPath transforms. This issue is fixed in versions 4.19.3 and 4.20.3.
AI Analysis
Technical Summary
The SimpleSAMLphp SAML2 library, a PHP library for SAML2 functionality, contains a vulnerability identified as CVE-2026-49289. This vulnerability is categorized under CWE-400, which typically relates to resource exhaustion or denial of service conditions. The affected versions include those prior to 4.19.3 and versions from 4.20.0 up to but not including 4.20.3. The data does not include specific technical details about the nature of the vulnerability beyond its classification or any vendor advisory or patch information.
Potential Impact
The vulnerability could potentially allow an attacker to cause resource exhaustion or denial of service conditions in affected versions of the SimpleSAMLphp library. This may disrupt normal service availability or degrade performance. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix information is provided, users should monitor official SimpleSAMLphp channels for updates and consider applying any future patches promptly.
(The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related fun ...) (CVE-2026-49289)
Description
The SimpleSAMLphp SAML2 library is a PHP library for SAML2 related functionality. In 4.19.2 and 4.20.2, the library permits attacker-controlled XPath transforms while processing XML signatures in specially crafted SAML messages. XPath evaluation can consume uncontrolled processing resources, allowing a remote unauthenticated attacker to deny service to any entity relying on SimpleSAMLphp or directly on the SAML2 library. The mitigation limits the number of transforms, permits only transform algorithms identified by the SAML 2.0 Core specification, and specifically rejects XPath transforms. This issue is fixed in versions 4.19.3 and 4.20.3.
CVSS v3.1
Score 7.5high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The SimpleSAMLphp SAML2 library, a PHP library for SAML2 functionality, contains a vulnerability identified as CVE-2026-49289. This vulnerability is categorized under CWE-400, which typically relates to resource exhaustion or denial of service conditions. The affected versions include those prior to 4.19.3 and versions from 4.20.0 up to but not including 4.20.3. The data does not include specific technical details about the nature of the vulnerability beyond its classification or any vendor advisory or patch information.
Potential Impact
The vulnerability could potentially allow an attacker to cause resource exhaustion or denial of service conditions in affected versions of the SimpleSAMLphp library. This may disrupt normal service availability or degrade performance. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or fix information is provided, users should monitor official SimpleSAMLphp channels for updates and consider applying any future patches promptly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5cjr-mxj5-wmrx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-49289"]
- Ecosystems
- ["Packagist"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6a46ecb227e9c7971943c587
Added to database: 07/02/2026, 22:56:50 UTC
Last enriched: 08/20/2026, 16:59:47 UTC
Last updated: 09/15/2026, 10:01:32 UTC
Views: 115
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.